121100103 has 10 divisors (see below), whose sum is σ = 180902744. Its totient is φ = 80733348.

The previous prime is 121100093. The next prime is 121100107. The reversal of 121100103 is 301001121.

It is not a de Polignac number, because 121100103 - 2⁶ = 121100039 is a prime.

It is a super-2 number, since 2×121100103² = 29330469893221218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100107) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 747451 + ... + 747612.

Almost surely, 2^121100103 is an apocalyptic number.

121100103 is a deficient number, since it is larger than the sum of its proper divisors (59802641).

121100103 is an equidigital number, since it uses as much as digits as its factorization.

121100103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495075 (or 1495066 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 121100103 is about 11004.5491956736. The cubic root of 121100103 is about 494.7451029247.

Adding to 121100103 its reverse (301001121), we get a palindrome (422101224).

The spelling of 121100103 in words is "one hundred twenty-one million, one hundred thousand, one hundred three".